JP2911983B2 - Car seat belt support structure - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to an automobile seat belt support structure.

(Industrial application field) As a seat belt support structure for automobiles, for example,
As described in JP-A-62-30529, an anchor stay is formed of a bar material such as a round bar, and a seat belt bracket pivotally supported on a seat side by a pin is provided on the anchor stay. It is slidably fitted so as to be sandwiched between engagement pins provided on the lower side, and when a load is applied to the seatbelt, the seatbelt bracket pivots between the pivot pin and the engagement pin. It has been proposed that the anchor stay bends in the forward direction with respect to the load direction so that the load applied to the seat belt is efficiently transmitted and supported to the vehicle body.

(Problems to be Solved by the Invention) However, in the above-described structure, the anchor stay is bent at the stage of absorbing and relaxing the load from the seat belt, and the bending direction of the anchor stay is forward with respect to the load direction. After bending, the load from the seat belt acts in a direction in which the seat is separated from the vehicle body floor. Therefore, to withstand the load from the seat belt after the anchor stay is bent,
Sheet reinforcement was required.

The present invention has been made in view of the above, and an object of the present invention is to provide a seat belt support structure for an automobile in which a load of a seat belt can always be applied in a direction for preventing the peeling of a seat. .

(Means for Solving the Problems) In order to achieve the above object, the solution of claim (1) presupposes a seat belt support structure of an automobile in which a seat is provided so as to be adjustable in a front-rear position by a seat slide mechanism. I do. The seat slide mechanism includes a fixed rail fixed to a vehicle body floor, and a movable rail attached to a lower side of a seat cushion of the seat so as to be slidably engaged with the fixed rail. A support bracket for fixing and supporting a belt anchor of the seat belt is provided on the cushion side, and a guide bar extending along the seat slide mechanism is provided on the vehicle body side, and the guide bar is connected to a lower surface of the fixed rail. A front end portion, and a rear end portion fixed to the vehicle body floor. The guide bar is slidably inserted into the support bracket, and the support bracket is slidable in the front-rear direction of the guide bar. The support portion, which is supported and the support bracket is supported by the guide bar, is configured to support the seat bell at the time of a frontal collision of the vehicle. By acting load to the support unit from, it is assumed that the front end of the guide bar is configured to exert a load downward relative to the fixed rail.

Further, in the invention of claim (2), a seat belt support structure of an automobile in which a seat is provided so as to be adjustable in the front-rear position by a seat slide mechanism is premised, and the seat slide mechanism extends in the front-rear direction and is fixed to the vehicle body floor. And a movable rail attached to a lower side of a seat cushion of the seat so as to extend in the front-rear direction and slidably engage with the fixed rail. A support bracket for fixing and supporting the belt anchor is provided, and a guide bar extending along the seat slide mechanism is provided on the vehicle body side, the guide bar includes a front end connected to the lower surface of the fixed rail, and the vehicle body. A rear end portion fixed to the floor, and the guide bar is slidably inserted into the support bracket. The support bracket is supported slidably in the front-rear direction at an intermediate portion of the guide bar, and the support portion, at which the support bracket is supported at the intermediate portion of the guide bar, supports the support bracket from the seat belt during a frontal collision of an automobile. When a load is applied to the portion, the front end of the guide bar is configured to apply a load downward to the fixed rail.

(Operation) According to the invention of claims (1) and (2), the load applied to the seat belt at the time of a head-on collision is released to the vehicle body via the belt anchor, the support bracket, and the guide bar. At this time, the load applied to the seat belt acts in a direction in which the seat is separated from the vehicle body floor, but at the same time as the load acts on the seat belt, the load escapes to the guide bar, and a bending moment acts on the guide bar. As a result, the load acts downward. That is, a load acts in a direction to prevent the sheet from peeling.

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

In FIG. 1 showing a seat belt support structure of an automobile, reference numeral 1 denotes an automobile seat, and the seat 1 is provided so as to be adjustable in the front-rear position by a seat slide mechanism 2.

In the vehicle seat 1, a hinge plate 5 as a support bracket is attached to a rear end of the seat frame 4 of the seat cushion 3, and a lower end of a seat frame (not shown) of a seat back 6 is attached to the hinge plate 5. Have been.

The hinge plate 5 includes a horizontal portion 5a fixed to the seat frame 4 and a vertical portion 5b extending vertically above the outer edge of the horizontal portion 5a. A base 7a of a belt anchor 7 is fastened and fixed to a vertical portion 5b of a hinge plate 5 extending from the seat cushion 3 side by bolts 8 and nuts 9.

Further, the seat slide mechanism 2 is mounted between the front and rear protrusions 11a and 11b of the vehicle body floor 11 in the vehicle front and rear direction, and has a fixed rail 12 having an inverted hat shape in cross section in which an intermediate portion is slightly raised from the vehicle body floor 11, The seat frame 4 of the seat cushion 3 is slidably engaged with the fixed rail 12.
And a movable rail 13 attached to the lower side of the seat 1 via a hinge plate 5. With the engagement relationship between the two rails 12, 13, the seat 1 is moved in the vehicle longitudinal direction by operating an operation mechanism (not shown). It can be adjusted.

Along the rails 12 and 13 of the seat slide mechanism 2, a guide bar 14 that is long in the front-rear direction is provided.

The guide bar 14 has a front inclined portion 14a having a front end connected to the lower surface of the fixed rail 12, an intermediate straight portion 14b connected to the front inclined portion 14a and extending rearward, and a rearward portion of the intermediate straight portion 14b. A rear inclined portion 14c which is continuously provided and whose rear end is connected and fixed to the vehicle body floor 11;

A guide plate 23 attached to the lower part of the hinge plate 5 by bolts 21 and nuts 22 is slidably supported by the intermediate straight portion 14b of the guide bar 14. The guide plate 23 includes an upper mounting portion 23a formed by stacking two plates, and a cylindrical portion provided below the upper mounting portion 23a and through which the guide bar 14 is slidably inserted.
23b.

With the above configuration, at the time of a frontal collision, the load applied to the seat belt is released to the vehicle body side (the vehicle body floor 11 and the fixed rail 12) via the belt anchor 7, the hinge plate 5, the guide plate and the guide bar 14.

At this time, the load of the seat belt acts in a direction in which the seat 1 is peeled off from the vehicle body floor 11, but at the same time that the load acts on the seat belt, the load acts on the guide bar 14 as well. Since a bending moment acts on the bar 14, a load acts downward (in the direction A) at the front end of the front inclined portion 14a.
That is, a load acts in a direction that prevents the fixed rail 12 of the seat slide mechanism 2 from peeling off. As a result, seat reinforcement becomes unnecessary, and cost and weight can be reduced.

Further, since the bending moment acting at the rearmost position, which is the most disadvantageous position in terms of the seat strength, can be released to the vehicle body floor 11 via the guide bar 14, it is not necessary to reinforce the hinge plate 5.

In the above embodiment, the hinge plate 5 is a support bracket extending from the seat cushion 3 side and provided with the belt anchor 7. However, the belt anchor 7 extending from the seat cushion 3 side is provided separately from the hinge plate 5. A support bracket may be provided.

(Effect of the Invention) Since the present invention is configured as described above, the load acting on the seat belt is shared between the seat slider mechanism and the vehicle body, and a reliable restraining force is exerted.

[Brief description of the drawings]

1 shows an embodiment of the present invention. FIG. 1 is a side view of a main part when a seat is at a front position, FIG. 2 is an enlarged view of a main part of FIG. 1, and FIG. It is sectional drawing in the III line. S: Seat belt 1: Automotive seat 2: Seat slide mechanism 3: Seat cushion 5: Hinge plate (support bracket) 7: Belt anchor 12: Fixed rail 13: Movable rail 14: Guide bar

Claims (2)

(57) [Claims] 1. A seat belt support structure for an automobile, wherein a seat is provided so as to be adjustable in a front-rear position by a seat slide mechanism, the seat slide mechanism comprising: a fixed rail fixed to a vehicle body floor; A movable rail attached to a lower side of a seat cushion of the seat so as to engage as possible, a support bracket for fixing and supporting a belt anchor of a seat belt is provided on the seat cushion side, A guide bar extending along the seat slide mechanism is provided, and the guide bar has a front end connected to a lower surface of the fixed rail, and a rear end fixed to the vehicle body floor. The guide bar is slidably inserted into the support bracket, and the support bracket slides forward and backward on the guide bar. The support portion, which is supported by the guide bar and the support bracket is supported by the guide bar, applies a load to the support portion from the seat belt at the time of a frontal collision of an automobile, so that the front end of the guide bar is fixed to the fixed rail. A seatbelt support structure for an automobile, characterized in that a load is applied to the vehicle downward. 2. A seat belt support structure for an automobile, wherein a seat is provided so as to be adjustable in a front-rear position by a seat slide mechanism, wherein the seat slide mechanism extends in the front-rear direction and is fixed to a vehicle body floor; A movable rail attached to a lower side of a seat cushion of the seat so as to extend in the front-rear direction and slidably engage the fixed rail; and a belt anchor of a seat belt is fixedly supported on the seat cushion side. A support bracket is provided, and a guide bar extending along the seat slide mechanism is provided on the vehicle body side. The guide bar is connected to a lower end of the fixed rail, and is fixed to the vehicle body floor. The guide bar is slidably inserted into the support bracket, and the support bracket The support bracket is supported slidably in the front-rear direction by an intermediate portion of the guide bar, and the support portion in which the support bracket is supported by the intermediate portion of the guide bar applies a load to the support portion from the seat belt during a frontal collision of an automobile. , The front end portion of the guide bar is configured to apply a load to the fixed rail in a downward direction.